Electric-arc lamp.



PATENTED JAN. 7, 1908.

J. A. MBAHER.

' ELECTRIC ARC LAMP. APPLIOATION FILED 00T.29. 1906.

JOSEPH A. MEAHER, JF- SLEVELAND, OHIO.

EILEiETRlTC-fiiifi LAMP.

No. erases.

filpecificaiiion of Letters Paacnted Jan. '7, 3.908..

Application filed Qcwber 29. 1906. Serial Non 841,024.

To all m /om ii. may concern.-

Bc il: known than, l, Jensen A. lilcnunn, cilizen o'l the United Stsles, residing at Cleveland, in the county ol Cuyahoga and State ol Ohio, have invented certain new and useful improvements in Electric-Arc Lamps, of which the .lollowing is a specificawon.

in;- inveni'ion relates lo improvements in electric-arc lamps and the paramount object to produce a generally improved lamp of this class which will be exceedingly simple in consiruclion, cheap of manufacture, and ellicienl in use.

The present emlmrlinn-nl of ihe invention is in the form of a head-light specially designed for use in connection with electric suburban cars, steam locomotives, etc.

The invenlion relates more particularly to imp'mvenienls in lhe construction and operaizion oi devices for holding and posiiiioning the upper and lower carbon electrodes.

An object is to construcr a simple and cfficient feeding mechanism for so controlling and regulating the descent of the upper inevable carbon electrode that lhere will be no perceptible varialion in the are when once struck. This object. is alfaiued bywhatnia'y be called s carbon ball chuich.

With these ends in YlGW, the invention consisfs in the novel construction, arrangement, and combiinirion of parts hereinafter dcscribed and illustrated in the accompanying drawings, and particularly pointed out in the appended claims.

Referring lo "the accompanying drawings, forming a pare of his specification, Figure 1, is a perspeciive YlLW of an improved headlig 1r, consi'ruci'ed in accordance with my invention and adapted to be attached to the dashboard of an ordinary electric car. Fig. 2, a front elevation of the same with the casingz'ind reflector removed. Fig. 3, a vertical sectional View of the magnet and-upper carbon clutch mechanism. Fig. 4, a vertical sectional View of the lower or fixed carbon hohling mechanism. Fig. 5, top plan View of the iidjusliablc tension iinecl'ianisin for ihe upper carbon clutch, Fig. 6, aplan View of the bottom or engaging portion of the upper carbon clutch. Fig. 7, a sectional detail View of a broken away portion of the glass and rim attaching and clamping mechanism.

l l l l l i l j 8, a front View of the same. Fig. 9, a cross sectional View of the lower or fixed carbon holding mechanism.

Similar characters of reference designaie like parts throughout all the figures of the drawings.

in the present embodiment of my inven tion, the various parts of the=lan1p are sup ported from a supporting-baclcplate or disk 1, and a magnet supporting-plate 2, provided with shields or wings 3. The disk or back plate is also provided with an annular flange or ring 4, and depending lugs or wings 5; .The casing 6, is provided with a 1nagneta car by means of suspcnding-hooks 9, whichtake over the upper edge of the dash-board, and adjusting-bolts 10, carried by the lugs 5, and provided with bumper-heads or blocks 11, which abut against the face of-ihe (lfifih'. board. The said adjusting bolts l0, and bumper-heads 11, enable the operator to make the proper adjustment of the lamps of dashboard.

The holding and adjusting mechanism for the lower or fixed carbonl2, and the holder for the globe 13, are supported by niezinsof a bracket 14, secured to the back-plate l, by means oi screws 15. The end of the bracketis provided with a depending head 16, provided with a central bore or opening in which is mounted a tubular shank 17, provided at its top with a cap or receptacle 18, in which rests the bottom of the'globe 13. The shank 17, is stationary in the head 16, and the globe 13, is secured in the cap 18, by means of a screw 1Q.

The lower carbon holder 20, is mounted within the tubular shank l7, and is priwided with a central opening" or bore inils top portion to form a seat to receive the lower carbon.

In order to enable the operator to TOIHOYG the carbon holder instai'illy and yet allow ZL screw adjustment, the holder 20., is provided donie or shield 7 and handles 8., and is de-" is fastened to the bracket 14, by means of a about its periphery with a deep spirally upper carbon 4.0, holding the latter and perarrangedgroove 21, adapted to be engaged mitting it tobe raised with the tubular arby one side of a wire loop 22, winch takes mature to form the arc, and when thearmainto and is positioned within a horizontal I 5 slot 23, formed in one side of the brackethead ,16,, and tubular shank 17. The loop '22, encircles the bracket-head 16,7 and is yieldinglv held in its normal positionby means of a coil-lspring 2-4, one end of which ture is lowered by the burning awa r of the carbon until the arc-adjusting plate 41, car- 70 ried by the upperend of the carbon clutch holder, strikes the upperend' of 'the magnet spool, the head block3 5 of the armature will be moved downwardly. over theballs-39, and

the same'will assume or be revolved out- 75 wardly to the larger diameter of the cavity of the head, and the carbon bein therebv released from the clutch of the bail s willfall until again grasped and held by the balls as the armature moves upward by the in- 30 creased stren th of the magnet, caused by the reestablis hment of the current by the contacting of the carbons.

he upper end of the tubular shank portion of the armature abuts against the lower 35 end, of the tubular-core portion to limit the upward movement ofthe same, and the bracket 29, the arms 29, of-which take over length of the pick-up or size of the arc, and are secured to the upper-and lower end when the current is turned on, is regulated screw 26, and'the other securedto a hook orloo 26, of the shank portion of the loop 22. he shank portion of the loop "22, is preferably provided with handle portion 27, by means of which the loop may be movedagainst the tension of the spring to'disengage, the same from the groove 21 ot' the holder 20, whereby the-latter may be removed in" stantly firom'the bracket-head 16. i i The tubular magnet 28, is supported and secured to the magnet supporting-plate portion 2, of the back-plate 1, by means of a.

250i the magnet to prevent the latter I from by means of the arc-adjusting late .41, so

getting out of alinement with the lower fixed threaded on the upper end oi the s ank porcarbon. tion of the tubular clutch. The adjustment T he magnet comprises the usual magnetic is made by revolving theclutch. coil or solenoid formed about a spool made The downward ressure ot the uppercarup of a tubular portion 30,and heads 31. bon clutch is ma e by means of bolts and 95 A tubular core portion 32, is mounted in the adjusting, nuts 42, and tension springs '43,, upper end of said tubular portion 30, and taking over the ends of the arc-adjusting forms, a guide for the upper portion of the plate 41. tubular upper movable carbon clutch holder The electrical connection is made through to be hereinafter described. a wire (not shown) connected to the upper 100 A tubular arinature 33, .is'mounted within endof the .ma et-coil or solenoid and passthe lower portibn 30, and has its lower end ing out'throug an'opening 44,'in;the side of depending from the magnet and' rovided the lamp-casing. Tie currentpassing from with a screw threaded head 34. -hehead. the magnet coil through the medium of a v 34,01": the armature carriesa head block35, wire 45, suitably connected to the head of 105 provided with a-central opening the walls of the armature. which are threaded to engage he threaded i When the lamp is in operation, the current portion of the head 34, andan inverted'trum asses to the lower carbon, thence through cated coneshapedchamberor cavity 36. the bracket 14, back-plate I, and hooks 9, to

- The upper carbon clutcheholder comprises the ground circuit. I 110 a tubular shank p'ortion37, carried within A globe-cap 46, takes into the; upper carthe tubular armature 33, and extending up hon-opening of the globe 1'3, and is provided wardly through the tubular core portion -32, with a central opening adapted to receive of the magnet. The lower end of the chitchthe upper movable carbon. The cap fits holder is provided with an inverted truncated I snugly to the parts and is adapted to prevent 115 cone-shaped head 38 having a depending air from getting into the globe, thus insuring carbon guide 38, and the clutch-holder is long life to the carbon. I movably mounted within the'tubular arma- The glass 47, is fitted within an annular ture by means of the head block 35, pro groove of clamping ring 48, the meeting vided with the cavity 36, taking over the same. ends of which are secured together by means 120 The head 38, is provided with three or ofa slidably mounted clamp ng'member49. more radially-extending apertures or rep The ring 48, is mounted w1th1na flanged cesses in which are located bearing-balls 39, door ring 50, which slips over the end of the the construction being such that when the case.-

head block 38, is in the lower portion of the From the fore 0mg descript on, taken in 125 chamber or cavity 36, of the head 35, of the connection with t e accompanying drawings, armature, and the latter is raised slightly, i the operation and advantages of my inventhe balls 39, are revolved and moved in tion will be readily-understood. wardly by Eontact with the inclined walls of Having thus described my'1nvention,w1th

the cavity 36, whereby the balls engage the out having attempted to set forth all the 131 forms in which it may be made, or all the and desire to secure bv vided with a tubular end of 52 id tub'ularportion oft-he solenoid, "a

iistinderarmaturemounted within the lower i of saidtubular portion of the solenoid waving its lower end de ending-from the ma net and provided wit an exteriOrlythreaded he'ad a head-block rovided with a cemral opening-in its lower portion" and an "eniarged wirn' erted truncated cone shaped cavity having the upper edges of its walls ihrear' d'to engage said eXteriorly-threaded head, a...- upper carbon clutch-holder comiinga tubular shank portion carried within said tubular armature and extending through sa d stationary tubular core portion and provided at itslower end with 'an'inverted? truncated-poneshaped head movably' rnountedand normally sustained within said tidinlarjarmature "by means of said head- 3 block taking overand forming a seat for said inverted t ncated cone-shaped"head, radialljyhxtenddng apertures formed in said head and carry 111g bearing-balls, and a springresis'ted" arcadjusting plate mounted above the solenoid a d adjustalily-secured to and normally. carried by the upper end of said carbon -c hitch holz'ler. o

2. In an electric arclamp, a magnet providedLwitha tubular core portion and a tu' provided with a depending buiar armature" I exteriorly-threaded head block carrying an adjustably mounted interiorly-threaded head. provided with an inverted truncated cone-s ape d havinga central opening,

and a tubular. carhon-clutch member provided with a sirnilarly shaped head mounted in said cavityand having a depending carhon-gliide extending throughsaid central opening, "said last-mentioned head being provided with radiaily-extending openings carvying bcaring-bails ada ted to bear against the inclined walls of said cavity. v

In an electric arc-lan1p, an upper carcomprising a tubular shank porhead provided with a depending carbonguide and radially extending openings conmining hearing-balls, and a tubular armature taking over said shank portion andprovided withlan adjustablyqnounted detachahle' exterior head "taking over said coneshaped' headand provided with a similarly shaped cavity the walls of which are adapted to engage said bearing balls and a central openingin its lower portion taking over said depending carbon-guide.

L In an electric arc-lamp, a lower carbon holder (comprising abracket provided wit-ha depending head having a central opening flierein, a tubular portion mounted in said said head and radial-lyextending openings cont loop attached to said b-racket diametrically-l opposite and taking into said horizontal slot and saidspirallwarranged groove.

In an electric arc-larnp, a lower carbon holder comprising a bracket provided with a depending head, a tubular shank mounted in provided with a cap or receptacle for supporting the globe,- a second tu bular shank mounted therein and provided with a spirallvarrangedgroove, a horizontal slot oropening formed in said depending head and said first mentioned shank mounted therein, and a spring-resisted wire loop attached to said bracket and taking into said horizontal slot and said spirally-arranged groove. I

6. In an electric arc-lamp, the combinationwith a magnet provided with a tubular core and armature, a tubular ball'clutch member mounted therein and provided at its lower end with an inverted truncated cone-shaped head havinga depending carhon-guide; of spring-resisted arc-adjustingplate-mounted at the upper end oisaid magnet and adjustably-secured to the upper end of said tubular ball clutchmemher, and a removable head-block provided with a central opening takingover said depending carbonguideand a cavity forming aselat for the head at the lower end of said ball clutch member and adjustably-secured to the lower end of said armature 7. In an. electric arc-lamp, an upper carhon clutch holder comprising a tubular shank portion terminating in an inverted truncated coneshaped head provided with aining bearing-balls, a tubular armature taking over said shank portion and provided with 'an enlarged exteriorly-threaded head, and a head block provided with a central opening in its lower portion and an enlarged inverted truncated cone-shaped cavity taking over said inverted truncated cone-shaped head and having its upper edges interiorly-threaded and taking over said enlarged exteriorlythreaded head of the armature.

S. An electric arcdamp, comprising a tubular armature provided with an exteriorly threaded depending-head, a tubular core mountedabove said tubular. armature to limit the upward movement of the same, a tubular ball clutch mounted within said armature and core and provided with an inverted I truncated cone -shaped dependinghead having radially-extending openings provided with balls} a spring1'esisted plate adjustably secured to the upper end of the armature and the upper end of said tubular ball clutch, an d an interiorly-threaded headblock adjustablysecured to said exteriorlythreaded depending head of the lower end of said armature and provided with an inverted truncated cone-sha ed .cavity taking over and carrying said oependinghead of said ball clutch.

l 9. In an electric arc-l amp, a tubular armature provided at its lower end with an exteriorly-threaded head, an upper carbon clutchholder comprising a tubular shank mounted within said tubular armature and extending through and above the magnet and provide at its lower" end with an inverted truncated cone-sha ed head, an interiorly-threaded adjustable ead-block taking over said exteriorly-threaded head and having an inverted truncated co'ne-sha e cavity taking over said inverted truncate cone -shaped headand normally and movably-sustaining said upper carbon. clutch-holder, and a spring-resisted arc-adjusting-plate adjustably secured to and normally carried by the upper end of said carbon clutch-holder.

10. In an electric arc-lamp, a tubular armature terminating in an exteriorly-threaded head, an upper carbon clutch-holder comprising a tubular shank mounted within said tubular armature and having its updpplr portion exteriorly threadedand exten g above the magnet, and its lower portion provided with an inverted truncated cone-shaped head having radially-extending openings carrying bearin -balls, a head-block provided with a centra opening in its lower portion and an enlarged inverted truncated cone shaped cavity inclosing' said inverted truncated conehapedhead and having the upper edges of its walls threaded to engage said exter1-' Orly-threaded head of the armature, and an arc-adjusting plate mounted upon said exteriorly-threaded' upper portion of the upper carbon clutch-holder and mounted above and secured to the magnet by means of adjustabl mounted tension-springs.

11. n an electridarc-lamp, the combination with a tubular armature provided with an exteriorly threaded head at its lower end,

and a spring-resisted tubular carbon-clutchvi ed with a similarly shaped cavit said head of the 'verted truncated cone-shaped cavity taking terp member adjustably' mounted therein and provided with an inverted truncated cone shaped head having radially-extendifio n-' ings ca 'ng balls; of a screw thre e justable cad-block taking over said exten orliy threaded head of the armature and proing said last mentioned head and b r 5'6 12. In an electric arc-lamp, the combine-f tion with a tub ular armature provided with a head at its lower end of a spri -resisted tubular, carbon-clutch ,member a justably mounted herein and-provided with an in-- vertedtruncated cone-shaped head carrying balls, and ahead-block adjustably secured to armature and provided with an inverted truncated cone-shaped cavity inclosing said head and balls of the clutch member.

13. In an electric arc-lamp, an n per carbon clutch holder comprising a tubu arshank portion provided with an inverted truncated cone-shaped head having radially-extending openings carrying bearing-balls, a tubular armature taking over said shank portion and provided with an enlarged exteriorly-thread ed head, a head-block provided with an in- 76 over said inverted truncated cone-aha head and having interior threadssecure tc said exteriorly-threaded head of the a'rma'- ture,- an arc-adjusting-plate normally-carried by the upper end said tubular shank portion of the carbon clutch-holder, guideolts mounted at the ends of said arc-adjusting-plate, adjusting-nuts secured to the upper ends of said guideI-bolts, and tensionsprings mounted, on saidguide-b'olts and inosed between saidadjusting-nuts and the ends of said arc-adjusting-plate.

' In testimony whereof I have signed my. name to this specification in the presence of two subscribing witnesses.

JOSEPH A. MEAHER.

Witnesses:

Oman 0. BILLMAN, v A. Ma'rmumaa. 

